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<td ><a href="../qtdoc/index.html">Qt 5.14</a></td><td ><a href="qtdesigner-manual.html">Qt Designer Manual</a></td><td ><a href="qtdesigner-module.html">C++ Classes</a></td><td >QAbstractExtensionFactory</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QAbstractExtensionFactory Class</h1>
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<p>The QAbstractExtensionFactory class provides an interface for extension factories in Qt Designer. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QAbstractExtensionFactory&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += designer</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherited By:</td><td class="memItemRight bottomAlign"> <p><a href="qextensionfactory.html">QExtensionFactory</a></p>
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<li><a href="qabstractextensionfactory-members.html">List of all members, including inherited members</a></li>
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<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionfactory.html#dtor.QAbstractExtensionFactory">~QAbstractExtensionFactory</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QObject *</td><td class="memItemRight bottomAlign"><b><a href="qabstractextensionfactory.html#extension">extension</a></b>(QObject *<i>object</i>, const QString &amp;<i>iid</i>) const = 0</td></tr>
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<h2 id="details">Detailed Description</h2>
<p>QAbstractExtensionFactory is not intended to be instantiated directly; use the <a href="qextensionfactory.html">QExtensionFactory</a> instead.</p>
<p>In <i>Qt Designer</i>, extension factories are used to look up and create named extensions as they are required. For that reason, when implementing a custom extension, you must also create a <a href="qextensionfactory.html">QExtensionFactory</a>, i.e a class that is able to make an instance of your extension, and register it using <i>Qt Designer</i>'s <a href="qextensionmanager.html">extension manager</a>.</p>
<p>When an extension is required, <i>Qt Designer</i>'s <a href="qextensionmanager.html">extension manager</a> will run through all its registered factories calling <a href="qextensionfactory.html#createExtension">QExtensionFactory::createExtension</a>() for each until the first one that is able to create the requested extension for the selected object, is found. This factory will then make an instance of the extension.</p>
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<p><b>See also </b><a href="qextensionfactory.html">QExtensionFactory</a> and <a href="qextensionmanager.html">QExtensionManager</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="dtor.QAbstractExtensionFactory"><a name="dtor.QAbstractExtensionFactory"></a><code>[virtual] </code>QAbstractExtensionFactory::<span class="name">~QAbstractExtensionFactory</span>()</h3>
<p>Destroys the extension factory.</p>
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<h3 class="fn" id="extension"><a name="extension"></a><code>[pure virtual] </code><span class="type"><a href="../qtcore/qobject.html">QObject</a></span> *QAbstractExtensionFactory::<span class="name">extension</span>(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span> *<i>object</i>, const <span class="type"><a href="../qtcore/qstring.html">QString</a></span> &amp;<i>iid</i>) const</h3>
<p>Returns the extension specified by <i>iid</i> for the given <i>object</i>.</p>
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